Play the Half-Life Series for Free
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Half-Life, Half-Life 2, Half-Life 2: Episode One, and Half-Life 2: Episode Two, as well as Half-Life: Opposing Force, Half-Life: Blue Shift, and Team Fortress Classic are free-to-play on Steam until the release of Half-Life: Alyx in March, developer Valve announced. Do note that this is a free to play and not a free to own offer...